An attempt to read/write/seek/open on the files that make up the index named failed. Check to see that the files index-name.IDX and index- name.PTR exist in the database directory. Check whether there is sufficient disk space to write to the index files. Check whether the file has been read or write protected. Increase the number of files in CONFIG.SYS to more than 100. See X001 for a description of operation errors.
